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Hi Paul,
A girdled tree will continue to live as long as the roots have =
carbohydrate reserves to fuel nutrient uptake and fuel root extension =
into fresh soil. Mineral nutrients (soluble carbohydrates in Maple) and =
water will move upward in the wood (xylem) as usual.=20
But soluble carbohydrates can not move from the top to the roots in =
the wood. The root system becomes starved, can not grow or absorb =
nutients to supply the top. And usually by year 2 the top dies.=20
The roots of some trees, Hemlock especially, will become connected =
to roots of adjacent trees. Thus if you cut a small Hemlock that is near =
a large Hemlock the small shoot-free stump will continue to grow in =
diameter for decades. Spruce will root graft as well, especially in =
compact soil where much root extension is along old root channels. =
Norway Maple apparently does this as well.
Yt, DW
----- Original Message -----=20
From: Paul MacDonald=20
To: naturens@chebucto.ns.ca=20
Sent: Sunday, July 22, 2012 10:24 PM
Subject: Re: [NatureNS] Norway Maple root grafting
Hi Dave
If you girdled the trees the top shouldn't have any connection with =
the roots? Agreed?
Therefore water, nutrients couldn't pass from the roots up and it =
wouldn't make
any difference if the roots grafted to another root or not as far as =
the girdled tree
was concerned. The nutrients must be passing up the stem to keep the =
trees living.
The wood is very porous and water may go through the wood
Perhaps a beaver could do the job?
Paul
-------------------------------------------------------------------------=
-----
From: David & Alison Webster <dwebster@glinx.com>
To: NatureNS@chebucto.ns.ca=20
Sent: Sunday, July 22, 2012 8:40:40 PM
Subject: [NatureNS] Norway Maple root grafting
Dear All, July 22, 2012
A hedge of Norway Maple, over a period or 30 years or so, gradually =
replaced a hedge of Liliac as they were supressed by large Ash trees at =
both ends. I decided to thin the Norway Maple hedge and girdled two =
trees three or perhaps four years ago.
I expected these girdled trees to be dead within two years but they =
were still full of life in 2012. The only way I can account for this is =
to assume that they readily establish connections with sound trees by =
root grafts. And this in turn may explain the ability of these trees to =
grow well in dense thickets/hedges.
Yt, Dave Webster, Kentville=20
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2197 / Virus Database: 2437/5143 - Release Date: =
07/20/12
------=_NextPart_000_01D6_01CD68A8.337F7D40
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charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.19258">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>Hi Paul,</FONT></DIV>
<DIV><FONT size=3D2> A girdled tree will continue to =
live as=20
long as the roots have carbohydrate reserves to fuel nutrient uptake and =
fuel=20
root extension into fresh soil. Mineral nutrients (soluble carbohydrates =
in=20
Maple) and water will move upward in the wood (xylem) as usual. =
</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> But soluble carbohydrates can not =
move from=20
the top to the roots in the wood. The root system becomes starved, can =
not grow=20
or absorb nutients to supply the top. And usually by year 2 the top =
dies.=20
</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> The roots of some trees, Hemlock=20
especially, will become connected to roots of adjacent trees. Thus if =
you cut a=20
small Hemlock that is near a large Hemlock the small =
shoot-free stump will=20
continue to grow in diameter for decades. Spruce will root graft as =
well,=20
especially in compact soil where much root extension is along old root =
channels.=20
Norway Maple apparently does this as well.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Yt, DW</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Dpaulrita2001@yahoo.com =
href=3D"mailto:paulrita2001@yahoo.com">Paul=20
MacDonald</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, July 22, 2012 =
10:24=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [NatureNS] Norway =
Maple root=20
grafting</DIV>
<DIV><BR></DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: #fff; FONT-FAMILY: times new roman, new =
york, times, serif; COLOR: #000; FONT-SIZE: 12pt">
<DIV><SPAN>Hi Dave</SPAN></DIV>
<DIV><SPAN>If you girdled the trees the top shouldn't have any =
connection with=20
the roots? Agreed?</SPAN></DIV>
<DIV><SPAN>Therefore water, nutrients couldn't pass from the roots up =
and it=20
wouldn't make</SPAN></DIV>
<DIV><SPAN>any difference if the roots grafted to another root or not =
as far=20
as the girdled tree</SPAN></DIV>
<DIV><SPAN>was concerned. The nutrients must be passing up the stem to =
keep=20
the trees living.</SPAN></DIV>
<DIV><SPAN>The wood is very porous and water may go through the=20
wood</SPAN></DIV>
<DIV><SPAN>Perhaps a beaver could do the job?</SPAN></DIV>
<DIV><SPAN>Paul</SPAN></DIV>
<DIV><SPAN><BR></SPAN></DIV>
<DIV><SPAN><BR></SPAN></DIV>
<DIV><BR></DIV>
<DIV=20
style=3D"FONT-FAMILY: 'times new roman', 'new york', times, serif; =
FONT-SIZE: 12pt">
<DIV style=3D"FONT-FAMILY: 'times new roman', 'new
york', times, serif; FONT-SIZE: 12pt">
<DIV dir=3Dltr><FONT size=3D2 face=3DArial>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> David & =
Alison Webster=20
<dwebster@glinx.com><BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">To:</SPAN></B> NatureNS@chebucto.ns.ca =
<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Sunday, July 22, 2012 =
8:40:40=20
PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> =
[NatureNS] Norway=20
Maple root grafting<BR></FONT></DIV><BR>Dear All, =
=20
July 22, 2012<BR> A hedge of Norway =
Maple,=20
over a period or 30 years or so, gradually replaced a hedge of Liliac =
as they=20
were supressed by large Ash trees at both ends. I decided to thin the =
Norway=20
Maple hedge and girdled two trees three or perhaps four years=20
ago.<BR><BR> I expected these girdled trees to be dead within =
two years=20
but they were still full of life in 2012. The only way I can account =
for this=20
is to assume that they readily establish connections with sound trees =
by root=20
grafts. And this in turn may explain the ability of these trees to =
grow well=20
in dense thickets/hedges.<BR><BR>Yt, Dave Webster, Kentville=20
<BR><BR><BR></DIV></DIV></DIV><A></A>
<P align=3Dleft color=3D"#000000" avgcert??>No virus found in this=20
message.<BR>Checked by AVG - <A=20
href=3D"http://www.avg.com">www.avg.com</A><BR>Version: 2012.0.2197 / =
Virus=20
Database: 2437/5143 - Release Date: =
07/20/12</P></BLOCKQUOTE></BODY></HTML>
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